Electrically-driven tire-inflating pump.



8.8. CARTWR'IGHT. ELECTBICALLY DRIVEN mi mrumms rum.

Patented July 24, 1917.

2 $HEETSSHET I APPLICATION FILED AH]. H, I9l6- A B. S. CARTWRIGHL,

ELEICTRICALLY DRIVEN TIREIINFLAUNG PUMP.

APPLICAION FILED APR. |1. 916- Patented July 24, 1917. V 2 SNEE\:SSHEET2 w M Q x. Q w

UNITED STATES. hrss'r OFFICE.

immurnr s. cmrwmom, or cannons, sou-repairers.

' mc'rmcniLY-nmvsa.rmsam'ns'rmo PUMP.

To all wlwmit may concern:

Be it known that 'l, BENJAMIN 8. Currwnmn'r, a citizen of th'e'UnitedStates, residing at Oelrichn,-in' e county of Fall River and State ofSouth akota, have invented certain-new and useful Im rovements inElectricall -Driven Tire-In ating Pumps,

iv I

" improvements in electrically driven air inn'simple, and cheapstructure an improved of which t e following is a specification.

; The present invention reletesto pum s and :more particularly to new.and use ul pumps. v v An object t my invention is to provide automobiletire pump having an electric motor associated therewith for driving thepump, the pum and motor being compactly artan ed in a ousing, wherebythe device maiy e easily transported from .lace to place-as'desir'ed Themotor emp oyed in conjunction-with my improved .pump is preferablyloivpowered, that is the motor which will supply sufficient power forthepump from a source of low voltage, such as e'storage battery or theignition system of an automobile.

f. Qther objects and advantages to be de trivcd'from the use of myimproved pump w1ll appearffrom the following detail de- "scription andthe'claims, taken withan in- V "spection of the accompanying drawings,in

which-- Figure l is a-vertical longitudinal sectionul' view of myImproved pump, the

pump structure being shown in vertical section Fig. 2 is .a verticaltransverse sectional view taken on the line 22 of Fig. 1, looking in thedirection of the arrow,

ig. .3 is a similar view taken on the line 3-3 of Fig. 1, looking-in thedirection of Specification of Letter: Pat cut.

i PatentedfJuly 24, '191q.

, Application m moran um. asru1 an.\o,4os.

the upper mnr giniilof the walls thereof for a urpose which willhereinafter appear,

y inventioh contemplates the provision of a simple, strong and durable,yet lightly constructed pump for inflating automobile tires. With thisend in view I have provided a pump embodying a cylinder 8' hav-' ing acrank case 9 provided with enlarged portions 10 to acconnn'odate camshereim'ifl 2 described. 'A relativelylar e openm 11 islprovidod in thebottorho thecran case 9 to facilitate inspection of the operatingmechanism, the crank case/being bolted as .1612 or otherwise secured tothe bottom wall 2 of the housing, 1. I provide an en lurged portion 13at the u per end 'of the cylinder 8 forming an air chamber, Saidenlarged portion 13 having communicating therewith entrance and exitports 14 and 15, respectively. The inlet and outlet ports form valveseats and communicate with the inlet and'outlet conduits 16 and .17,respec-a ti'vely, said conduits l6 and 17 being upwardly turned, theconduit 16 being vided with a'closin-gjcap 18' whennot in use, and theoutlet or exit conduit 17 being pro-- vided with a removable serratednipple 19 for connection with a hose or the like flexible conductingmeans the end of which is to be attached to the tire orthe like. Theenlarged portion 13 is provided-with a. pair of removable screw lugs 20for permitting inspection of thevaii'e members hereinafter described orto permit insertion or removal of said valve members.

The pumping element of my invention comprises a piston 21 reciprocallymounted in the cylinder 8 and having the usual packing ring 22,saidcylind'er being'connected with the cranki23 of a crankshaft 24 bymeans of a connecting rod 25, I provide valve members for controllingthe entrance and exit ports 14 and 15, said valve members beingdesignated 26 and 27, res ectively, and being of the disk type. In or erto 11 cilitate removal of the crank shaft when desired one of the wallsof the crank casing 9 is provided with a slot '23 and 'e demountablcbearing. 24 serves to mount the crank shaft adjacent thereto; Tooremov'ethe shaft the crankis turned to ie' rieter with the slot, the gear 34and bearin 24 are removed and the shaft may be witl rawn,

The valve members mentioned are carried on the upper ends of operatingrods 28 and ing 9 and extending upwardly therefrom.-

The rods 28 and 29 extend'through the ena trance and exit conduits asbest shown in Fig.

' mam power receiving 3. -A pair of coil springs designated 32 and 33,respectively, serve to maintain the valves 26 and 27 normally in closedposition. I provide means for opening and closing the valve in propersequence, said means including a car 34 keyed t0 the crank shaft 24 andmes ing-valve o crating gears 35 and 36 mounted on cam s afts 37 and '38which-in turn carry cams 39 and '40, respectively. 'The lower ends .ofthe valve rods 28 and 29 engage the cams 39 and 40, and suitableanti-friction rollers, best shown in 'Fig. 3, beingcarried by the lowerends of said valve rods for eliminatin friction between the'ends of therods and t e cams.

An'electric motor 41 mounted in-the housin 1 of the bottom wall 2thereof, said motor ving the usual armaturezshaft 42 carrying apinion-43 for making engagement with the main power receiving gear 34hereinbefore referred to; A fly wheel 44 is mounted on the rear end ofthe shaft 24 for assisting ii -maintaining a steady non-fluctuatmpumping operation. 0 preferred arrangement of friction rollershereinbefore referred tois shown in Fig. 4 wherein the lower end of oneof the valve rods in this the rod 28 is bifurcated to provide spacedarms 45 between which is journaled an anti-friction roller 46. j

A suitable circuit controlling means may rovided for the motor 41, saidmeans pre erably comprising a knife switch 47 arranged on thelpartition7 to be easily accessible for'use. will be seen that in using myimprovedpump an automobile 'tire maybe 'quickly and easily inflated, the devicebeing relatively small and intended for eas reception into the tool boxof an automobi e. The cams 39 and 40 are adapted toalternately andintermittently open and close the valve the as:

extendin through said casing, sai

necessary qualifications for strength and durability, is light inconstruction, easily manufactured and effective in operation.

From the above description taken in connection with the accompanyingdrawings, it is thought that a clear and comprehensive understanding ofthe construction, operation and advantages of my invention may be had,and while I have shown and described my invention as embodying aspecific structure, I desire that'it be understoodthat I may make suchchanges on said structure as do not de part from the spirit and scope ofthe invention as claimed. a

What I claim as new and by Letters-Patent is z 1. In a portable pum ofthe class described, a combination 0 a housing, a hori zontallyextending partition ad' acent thetop of saidhonsing, a ump' cylinersecured to the bottom of said ousing air inlet and'outlet passages forsaid cylinder in the housing, apiston operable in said cylinder, valvecontrollin secured desire to secure eratively associated with the pistonand valve I controllmg means, and-..a',control switch for. said motor onthe partition adjacent the top of said housing.

2. In a portable pump of the class 'dehinged top,: a.- horizontallyeitendin partition beneath said to ,a pum scribed, a'combination of ahousing having a crank :casmg secur to the ottonti of said housing, airinlet and outlet assages for said cylinder extending upwar y through thepartition, a piston operable in said cylinder, a removable crank shaftinsaid casing .en-"

gaging the tpiston and having one and extendin -throng ta shafts in saidcasing operably. engagin the valve control means and hav one enprojecting ends aving intermeshmg gears t ereon, a motor secured to thebottom of the housing outer wall of the crank case, a pinion thereonsaid casing, parallel supplemen i and having one end of its axis mountedin the shaft, and a control switch for the motor on the partition in thetop of the housing.

In testimony whereof I afiix my signature hereto;

BENJAMIN S. CARTVYRIC'rHT.

